nonstandard extension used : 'var' : loop control variable declared in the for-loop is used outside the for-loop scope
When compiling with /Ze, a variable declared in a for loop was used after the for-loop scope. A Microsoft extension to the C++ language allows this variable to remain in scope.
By default, this warning is off.
#pragma warning(default:4289) void main() { for (int i = 0 ; ; ) ; i++; }